%0 Conference Proceedings
%T Tests of the Nature of Scalar Mesons and Tests of the Gluon Content from D-(s) Semileptonic Decays
%+ Laboratoire de Physique Mathématique et Théorique (PMT)
%A Dosh, H.G.
%A Narison, Stephan
%Z 6 pages latex file. 4 fig.eps
%< avec comité de lecture
%Z 02-025
%( Nuclear Physics B - Proceedings Supplements
%B QCD 02 9th High-Energy Physics International Conference on Quantum ChromoDynamics
%C Montpellier, France
%I Elsevier
%V 121
%P 114 - 118
%8 2001-07-02
%D 2001
%Z hep-ph/0208271
%R 10.1016/S0920-5632(03)01824-3
%Z Physics [physics]/High Energy Physics - Phenomenology [hep-ph]Conference papers
%X We summarize the different features which show that QCD spectral sum rule analyses of the scalar two- and three-point functions do not favour the $\bar uu+\bar dd$ interpretation of the broad and low mass $\sigma (0.6)$ and emphasize that a measurement of the $D_s$ semileptonic decays into $\pi\pi$ can reveal in a model-independent way its eventual gluon component $\sigma_B$. The analysis also implies that one expects an observation of the $K\bar K$ final states from the $\sigma_B$ which may compete (if phase space allowed) with the one from a low mass $\bar ss$ state assumed in the literature to be the SU(3) partner of the observed $\sigma (0.6)$ if the latter is a $\bar uu+\bar dd$ state
%G English
%L hal-00268376
%U https://hal.science/hal-00268376
%~ CNRS
%~ UNIV-MONTP2
%~ UNIV-MONTPELLIER
%~ UM1-UM2